Sin against the Holy Spirit
It is not god that blinds the eyes of men or hardens their hearts. He sends them light to correct their errors, and to lead them in safe paths; it is by the rejection of this light that the eyes are blinded and the heart hardened. Often the process is GRADUAL, AND ALMOST IMPERCEPTIBLE. Light comes to the soul through God's word, through His servants, or by the direct agency of His Spirit; but when one ray of light is disregarded, there is a partial benumbing of the spiritual perceptions, and the second revealing of light is less clearly discerned. So the darkness increases, until it is night in the soul.
Thus it had been with these Jewish leaders. They were convinced that a divine power attended Christ, but in order to resist the truth, they attributed the work of the Holy Spirit to Satan. In doing this they deliberately chose deception; they yielded themselves to Satan, and henceforth they were controlled by his power.
Closely connected with Christ’s warning in regard to the sin against the Holy Spirit is a warning against idle and evil words. The words are an indication of that which is in the heart. “Out of the abundance of the heart the mouth speaketh.” But the words are more than an indication of character; they have power to react on the character. MEN ARE INFLUENCED BY THEIR OWN WORDS. Often under a momentary impulse, prompted by Satan, they give utterance to jealousy or evil surmising, expressing that which they do not really believe; but the expression reacts on the thoughts. They are deceived by their words, and come to believe that true which was spoken at Satan's instigation. Having once expressed an opinion or decision, they are often too proud to retract it, and try to prove themselves in the right, until they come to believe that they are. It is dangerous to utter a word of doubt, dangerous to question and criticize divine light. The habit of careless and irreverent criticism reacts upon the character, in fostering irreverence and unbelief. Many a man indulging this habit has gone on unconscious of danger, until he was ready to criticize and reject the work of the Holy Spirit. Jesus said, “Every idle word that men shall speak, they shall give account thereof in the day of judgment. For by thy words thou shalt be justified, and by thy words thou shalt be condemned.” DA 322-323